CN102333624A - Improved process and apparatus for feeding cementitious slurry for fiber-reinforced structural cement panels - Google Patents

Abstract

An apparatus and process for depositing slurry upon a moving forming web. The apparatus includes a pivotally mounted headbox for depositing slurry from the inner bottom surface of the headbox down an inclined spillway as a continuous curtain onto a moving web. The headbox is mounted transverse to the direction of travel of the moving web. The headbox also has vertical edge boards, including a headbox back edge board and two opposed headbox side edgeboards, on three respective sides of the headbox to prevent slurry from spilling over the sides and back of the headbox. The headbox is supplied with slurry from a slurry mixer by a feed line mounted on a reciprocating trolley which moves, transverse to the direction of travel of the moving web, back and forth along the length of the headbox.

Description

To be used for the improving one's methods and installing of cement mortar charging of fibre-reinforced structure cement plate

Technical field

The present invention relates to a kind of continuation method and relevant apparatus of using the condensable slurry to produce structural slab of being used to; And relate more specifically to a kind of improved slurry feeder headbox apparatus; This device is used to make the cement plate of enhancing; Be referred to herein as structure cement plate (SCP), wherein fiber and rapid hardening slurry make up so that flexural strength is provided.

Background technology

Cement plate has been used to form in the building industry interior wall and the exterior wall of dwelling house and/or pattern of trade.Compare with the wallboard based on gypsum of standard, the advantage of this type of plate comprises moisture-proof.Yet a shortcoming of this type of conventional plate is that they do not have is making this type of plate can compare favourably with the enough structural strengths on the degree of (if be not better than) structural plywood or oriented wood chipboard (OSB).

Typically, this cement plate comprises at least one hardened cement composite bed between the multilayer of a kind of enhancing or stability material.In some cases, this enhancing or stability material are glass fibre mesh fabric or equivalent.This mesh fabric usually with a sheet form from a roller be applied on the multilayer condensable slurry or between.The instance that is used for the production technology of conventional cement plate is provided at U.S. Patent number 4,420,295; In 4,504,335 and 6,176,920, their content is combined in this by reference.In addition, other gypsum-cement compositions briefly are disclosed in U.S. Patent number 5,685,903; In 5,858,083 and 5,958,131.

The U.S. Patent number 6 of Tonyan; 620; 487 (being combined in this in full with it by reference) disclose the plate of a kind of enhancing, lightweight and dimensionally stable, and this plate can anti-shearing load (on being fastened to framework time equal or exceed the shear-loaded that is provided by glued board or oriented wood chipboard).These plates have adopted an inner core of the continuous phase that curing produced of the aqueous mixture that is made up of sulfate alpha hemihydrate calcium, water cement, active pozzolans and lime; This continuous phase is enhanced and contains the blend of ceramic microsphere or microballoon ceramic and polymer through alkali-resistant glass fiber; Perhaps form with a kind of aqueous mixture that reacts the powder weight ratio by water with 0.6/1 to 0.7/1, or its a kind of combination.At least one outer surface of these plates can comprise the continuous phase of a curing, and the continuous phase of this curing is enhanced through glass fibre and contains polymer spheres enough, that improve nailability perhaps by providing a kind of water that is similar to the effect of polymer spheres to process or its a kind of combination with the reaction proportion of powder.

No. 2005/0064055 (application number 10/665 of the U.S. Patent Application Publication of Porter; 541) (be combined in this in full with it by reference) and disclosed a kind of a kind of embedding device of using at the structural slab production line of being used for; Wherein slurry is transferred on a mobile vehicle with respect to a support frame; And the fiber laydown of chopping is on this slurry; This embedding device comprises: one first slender axles; These first slender axles are secured on this support frame and have first a plurality of axially spaced disks: one second slender axles, these second slender axles are secured to this support frame and have second a plurality of axially spaced disks, and this first is arranged to respect to this second and makes these disks mesh each other.This relation of being meshing with each other has strengthened embedding in these fibers to this slurry and has also prevented that this device from stopping up because of the pulp particle of premature set.

People's such as Dubey U.S. Patent Application Publication 2005/0064164 (application number 10/666; 294) (be combined in this in full with it by reference) and disclosed a kind of multilevel method that is used for the production structure cement plate, this method comprises: a mobile network sheet (web) (a.) is provided; (b.) (i) at the independent loose fiber of ground floor of deposition on this net sheet, then at deposition one deck condensable slurry on this net sheet and (ii) deposition one deck condensable slurry on this net sheet, this one of them; (c.) loose fiber that the second layer is independent of deposition on this slurry; (d.) effectively that this second layer is independent loose fiber is embedded in this slurry so that these Fiber Distribution spread all over this slurry; And (e.) repeating step (ii) to (d.) until the number of plies that obtains desirable coagulable fiber-enhanced slurry and make these Fiber Distribution spread all over this plate.A kind of structural slab of producing through this method, a kind of device, and a kind of structure cement plate with a plurality of layers of producing constitution water mud plate according to this method that be applicable to also are provided, and each layer all is following formation: on a mobile network sheet deposition one deck condensable slurry, on this slurry deposit fiber and these fibers are embedded in this slurry so that each layer all integrally forms with adjacent layer.

People's such as Dubey U.S. Patent number 6,986,812 (being combined in this in full with it by reference) has been showed and a kind ofly has been used for a SCP board assembly line or uses the condensable slurry to produce the slurry feed device of the similar application of building object plane plate or plate therein.This device comprises a main metering roll and a secondary roller, they be each other near, substantially parallel relation places to form the roll gap of a slurry supply of a clamping therein.These two rollers preferably make in rotation on the same direction and are deposited on the mobile network sheet of this SCP board assembly line from the slurry that the roll gap above this metering roll draws.Provide with this main metering roll THICKNESS CONTROL roller that operability is adjacent closely to keep a desirable thickness of this slurry.

People's such as Tonyan U.S. Patent Application Publication 2006/0174572 (being combined in this in full with it by reference) discloses the not flammable SCP sheetmetal frame system that is used for shear wall.

People's such as Stotz U.S. Patent number 6248214 has disclosed a kind of pivot head box that is used for paper machine.Referring to the 7th hurdle the 14th to 46 row that relates to Fig. 2, axis 24a is provided in the zone of nozzle end or flow export 15 and makes a respective nozzles stream angle change.It is being very limited aspect the tilt adjustment that Stotz head box (it more is similar to an extrusion device rather than an open headbox) uses a cylinder (the 12nd) that is arranged in below this head box to control this inclination angle and compare with the degree of regulation that simple handgrip on the pivot that is positioned at the used head box of the present invention through carries out.

People's such as Koepke U.S. Patent number 4479987 has disclosed a kind of free fall type fluid curtain 4, this free fall type fluid curtain two material sheet side direction guides through an extremely limited zone that is limited on a plurality of heavy curtain framves 9 of vertical arrangement (the 6th hurdle the 58th to 59 row).This arrangement can not be operated for a kind of cement mortar that comprises caking and chip and rapid condensation.This arrangement will cause the obstruction in the zone between the heavy curtain, thereby cause the slurry heavy curtain that is deposited on the net sheet damaged.Vertically heavy curtain pivots and ability that heavy curtain is torn provides to a great extent and uses a kind of auxiliary liquid of sending through supply pipe 10.To be used for the rodent cement slurry that condenses of the present invention be unpractical for a kind of for this.

People's such as Dahl U.S. Patent number 4420371 has disclosed a kind of pivoted paper headbox apparatus; This pivoted paper headbox apparatus is compared with the one-handed performance handgrip of pivot in being attached to the present invention, is to use one to pass catching axle or being positioned at the jack of machine back or other pivot devices that cylinder activates by of a typical bearing.Pivot among the present invention is set in the york piece, and this york piece only allows to move up and down to be easy in this line, remove this device but do not allow this device to move along the direction of this conveyer belt.Head box among the Dahl also is designed to make this head box and the vibration from neighboring devices to isolate, rather than is designed to that head box is vibrated and keeps slurry flowing and distributing in head box of the present invention.

People's such as Ebeling U.S. Patent number 4165211 has disclosed a kind of device that is used for but one deck liquid foamed reaction mixture is applied to a support member that moves continuously.According to a particular, the distributor passage is adapted to be the axis that extends to conveyer belt around a horizontal line pivot (the 2nd hurdle the 53rd to 58 row).This pivot action makes it possible to the volume in the control dispenser passage and therefore controls the intermediate storage time of the reactant mixture in this passage (referring to Fig. 1, and go in the 3rd hurdle the 31st to 47).The Ebeling device will allow heavy cement granules final settlement to get off, thereby the bottom radii of filling this head box is discharged antelabium up to this.The present invention uses vibration and a kind of combination of head box angle to control the discharge currents kenel of head box.The inclination angle is used to guarantee that material discharges to guarantee to keep a heavy curtain from head box consistently.Pivot on this head box is placed as the variable in distance that makes between wasteway antelabium and the product that is just forming (the Ebeling device that is placed on the approximate center of head box with pivot is therein compared) and minimizes.As if the pivot action of Ebeling device be limited to flowing of this device of control and do not allow and at once the head box content is dumped on this is with as the same in the present invention.

People's such as Mod U.S. Patent number 3,360,392 has disclosed a kind of reservoir 38 and spout 39 (Fig. 2 and the 2nd hurdle the 63rd to 70 row).Head box among the Mod does not provide the pivot of head box or the vibration of head box to keep slurry flowing and distributing in head box, to provide as the same in the present invention continuous slurry heavy curtain of deposition on the net sheet.

When preparation SCP plate, an important step is that cement is fed to this production line.Hope that improved slurry feed device is to improve speed of production and to reduce downtime.

Also hope a kind of be used for cement plate that producd fibers strengthens improve one's methods and/or relevant apparatus has and can compare favourably with the structural plywood that reduced the production line stop time and the plate of OSB to produce a kind of its structural property.Also hope that a kind of method and/or relevant apparatus that is used to produce this type of structure cement plate reduces production cost more effectively to use component material with respect to conventional production method.

In addition, above-mentioned cement structures plate (also being called SCP) preferably is configured to running under the structural environment that is similar to glued board and OSB.Therefore, the SCP plate is preferably nailable and can use conventional saw and other conventional wood working tools to cut or process.In addition; The SCP plate should satisfy the expansion that causes about shear resistant, load capacity, water, and anti-flammability build the thing codes and standards, like what measure: such as the ASTME72 that is applicable to structural plywood, ASTM661, ASTMC1185 and ASTME136 or equivalent through the test of following approval.

The improvement that is proposed among the common unsettled U.S. Patent Application Publication 2008/0099171A1 allows a kind of head box that firm and continuous slurry will be provided.Yet technological therewith some problem and the defective that is associated comprises: numerous electrical control member (2 motors and 2 limit switches); The big area occupied of about 3 linear feet on the line, it covered to the physics in the district that is shaped and vision near (this can make shortcoming longer the time interval be not detected); Slurry between place, the end of roller and the roller is revealed (be because wearing and tearing with firm encapsulating method can not be provided); Using the rotation roller to move insufficient stirring of the slurry in the head box under the situation of the slurry in the head box and mobile; Difficulty cleaning that causes because of material therefor and the head box complexity that has caused high cost of manufacture.

Summary of the invention

The present invention has realized the target identical with old slurry head box, and the firm slurry heavy curtain of the width of the product that a kind of leap just forming promptly is provided.The present invention no motor or limit switch, with the area occupied of about 1.5 linear feet, to the remarkable enhanced physical in the district that is shaped and vision is approaching, using slurry to head box locate to send under the situation of power the stirring of the enhancing of the slurry in the head box, easier cleaning and the situation about getting rid of fully that obtains slurry is leaked with 10% of the cost of original design under realized this target.

The present invention for the user provide the angle (if necessary words) of quick change head box keep simultaneously most advanced and sophisticated distance to product (usually the tip to the distance of product should be about 1 inch to keep a kind of firm unbroken heavy curtain) ability.

The present invention also for the user provide under the production line stop situation through using a simple and easy handgrip on one of pivot rods on the head box sidewall to make head box tilt to dump slurry at once and not having in the open type york piece support member of each side head lamp brush guard pivot bar of production line, to remove at once under the situation of instrument the ability of head box.

The present invention processes, has formed or mechanically attached simple side plate by metal (typically being stainless steel), and can use the vibrator (pneumatic or electronic) that extensively can get to come whole head box is applied vibration.This vibration guaranteed cement mortar flow out head box equably and help to make the sidewall of head box and the accumulation of the precoagulation cement on the bottom minimized.

Advantageously, head box of the present invention is easy to move and cleaning; Contain MIN movable part; Very durable; On entity, be significantly smaller than existing apparatus, thereby it provides approaching to the physics and the vision of the urgent need of head box peripheral region; And compare on cost much lower with existing headbox apparatus.

The present invention has showed a kind of slurry feed device (being commonly referred to " head box "), and this slurry feed device is used at a structure cement plate (SCP plate) production line or uses the condensable slurry to come the production fiber reinforcement to build on the mobile network sheet of thing with the similar production line of plate or plate therein depositing slurry.

This slurry feed device has been used and has been installed in a slurry supply hose on mobile trolley used, and this mobile trolley used length along this head box moves forward and backward so that make above the wasteway of slurry from this forming net sheet and constantly to stir and to move the required power of slurry in this head box through out-of-date for this slurry provides.The needs that this simplified design has avoided pair roller (comprising a main metering roll and a secondary roller) to be rotated; These rollers be each other near, substantially parallel relation is positioned in this head box and totally and locatees transverse to the direct of travel of this net sheet, also this slurry is moved to this forming net sheet from this head box to stir this slurry.This simplified design has also been eliminated the needs to a drive system in this head box, and this drive system is used for along drive this metering roll and should the pair roller with identical direction.

This head box is equipped with a vibrator, and this vibrator typically is attached on the rear wall of this head box and through a hydraulic line and moves, and gives vibration with the wall to this head box.Slurry accumulation that this end that helps avoid this head box is located and the premature set of the slurry in this head box.

Method of the present invention provides a kind of cement slurry with the flowability improved through using a vibrator to come to give shearing force to the slurry in this head box.This help have bigger water to the cement solids scope, more obtain on cement and the water slurry of wide region slurry on the mobile network sheet uniform deposition and do not have premature set.A large amount of slurries that the present invention has advantageously avoided building in the turning of this head box are piled up.

Typically, this slurry feeder is used to a kind of multilevel method of production structure cement plate (plate of SCP or SCP plate) and SCP plate of being produced through this kind method of being used for.Carrying out fiber loose distribution, chopping or one deck slurry behind one of embryo deposit on the mobile network sheet, deposit fiber on this pulp layer.Embedding device fully is mixed into the fiber of recent deposit in the slurry and ties up, and makes these fibers spread all over this slurry and distributes, and adds extra pulp layer subsequently, adds the fiber of chopping then, and carry out more how embedding subsequently.As required, each layer to this plate repeats this method.After accomplishing, this plate has a more equally distributed fibre fractionation, and this has produced powerful relatively plate and the hassock of the enhanced fiber that need not to be taught in the cement plate production technology like prior art.

Description of drawings

Fig. 1 is a diagram elevation that is applicable to the SCP board assembly line of this slurry head box.

Figure 1A is the view that cement slurry is pumped to a kind of typical slurry compounder systems in the head box of the present invention.

Figure 1B is applicable to a kind of even plate forming device that after slurry is deposited on this production line, on the net sheet, forms slurry in slurry head box of the present invention.

Fig. 2 is the fragment vertical section according to a kind of structure cement plate of this program production;

Fig. 3 is the side view of a kind of typical slurry blender that can use with the head box of slurry feed head box of the present invention.

Fig. 4 system is installed on the photo of the side view of the slurry box of the present invention on the guide rail of production line.

Fig. 5 is the photo of the front perspective view of the slurry of the present invention slurry case that on this production line, moves.

Fig. 6 is a perspective view of head box of the present invention, and wherein pivot pin is installed in the vertical york piece.

Fig. 7 is another perspective view at the back side of head box of the present invention, has shown the vibrator on the rear wall that is installed on head box of the present invention.

Fig. 8 is the diagram elevation of another embodiment that is applicable to a SCP board assembly line of this slurry head box.

The specific embodiment

Referring now to Fig. 1, show to illustrated a structural slab production line, and totally be appointed as 10.Production line 10 comprises support frame or the shaping platform 12 with a plurality of supporting legs 13 or other support members.On support frame 12, comprise a mobile vehicle 14, circulating rubber like conveyer belt for example with level and smooth impermeable surface, however considered porous surface at this.Like what know in this area, support frame 12 can be comprised by at least one specifies tables' shape section of supporting leg 13 or other supporting constructions to process.Support frame 12 also comprises a main drive roll 16 at far-end 18 places that are positioned at this framework and is positioned at an idler roller 20 at near-end 22 places of this framework.And, typically provide at least one band follow the trail of and/or tensioning apparatus 24 with keep carrier 14 on the roller 16,20 hoped tension force and location.In this embodiment, the SCP plate is along with this mobile vehicle marches to far-end 18 and production continuously from near-end 22 along a direction " T ".

In this embodiment, the net sheet 26 or a plastic carrier of a brown paper that is used for supporting before condense slurry, release liners can be provided and be placed on the carrier 14 to protect it and/or it is kept clean.

Yet, also considered to substitute net sheet 26 continuously, can on carrier 14, place a kind of independent thin slice (not shown) of relative stiffness material, for example, the polymer plastic thin slice.

Also considered and directly on carrier 14, formed the SCP plate of being produced by this line 10.In a kind of situation in back, at least one band cleaning unit 28 is provided.As known in the art, carrier 14 moves along support frame 12 owing to the combination of the motor, belt pulley, belt or the chain that drive this main drive roll 16.The speed of having considered carrier 14 can change with the product that is suitable for just making.

Shredding machine

In the present invention, the fiber 30 that is of a size of about 1 inch loose chopping through deposition one deck on the plastic carrier of net on the sheet 26 starts the production of structure cement plate (SCP plate).This production line 10 has been considered various fiber laydown and shredding mechanism.For example, a kind of exemplary systems has adopted 31, one sections on the support (rack) of the some glass-fiber cord reels 32 of fixing or a string 34 fiber in each reel, to be fed to a chopping station or device (being also referred to as shredding machine 36).Usually the multiply glass fibre is fed to each place, chopping station.

Shredding machine 36 comprises the roller 38 of the band blade of a rotation, has stretched out a plurality of blades 40 that radially extend of the width horizontal expansion that strides across carrier 14 from it, and is near, the relation that contacts, rotate with a backing roll 42 and arranges.In this preferred embodiment, the roller 38 of band blade and backing roll 42 be relatively near relation and arrange, make the rotation of roller 38 of band blade also make backing roll 42 rotations, yet also considered opposite situation.In addition, backing roll 42 preferably is coated with a kind of resiliency supported material, and these blades 40 are chopped into multistage against this resiliency supported material with cord 34.The spacing of blade 40 on roller 38 determined the length of the fiber of chopping.As seen in Figure 1, shredding machine 36 is placed in carrier 14 tops near this near-end 22 so that the production purposes maximization of the length of production line 10.When fiber strand 34 did not shred, these fiber looselys dropped on the carrier web sheet 26.

The slurry blender

This production line 10 comprises a pulp preparation and pull-on section 2 (Figure 1A).Pulp preparation and pull-on section 2 comprise that one totally is appointed as 44 slurry feed station or slurry feeder or a slurry head box and a slurry source (being a wet mixed device 47) in this embodiment.The supply that slurry feeder 44 self-wetted blenders 47 receive slurry 46 is to be deposited on slurry 46 on the fiber of the chopping on the carrier web sheet 26.Also considered this method can from slurry on the carrier 14 embryo deposit and begin.

Though considered various condensable slurries, this method specifically is to be designed to production structure cement plate (SCP plate).Therefore, that preferably know in Portland cement, gypsum, aggregate, water, accelerator, plasticizer, blowing agent, filler and/or this area by the difference amount and other compositions that in the following patent of listing (being combined in this by reference), describe of slurry 46 constitute.The relative quantity of these compositions (comprise and get rid of some above composition or add other compositions) can change to be suitable for the desired use of final products.

People's such as Tonyan U.S. Patent number 6; 620; 487 (being combined in this in full with it by reference) have disclosed structure cement plate (SCP) a kind of enhancing, lightweight, dimensionally stable, this structure cement plate adopts the inner core of the continuous phase that curing produced of the aqueous mixture that is made up of sulfate alpha hemihydrate calcium, water cement, active pozzolans and lime.This continuous phase is enhanced and contains the blend of ceramic microsphere or ceramic microsphere and polymer microballoon through alkali-resistant glass fiber, or is formed with a kind of aqueous mixture that reacts the powder weight ratio by the water with 0.6/1 to 0.7/1, or its a kind of combination.At least one outer surface of these SCP plates can comprise that solidifies a continuous phase, and this curings continuous phase is enhanced through glass fibre and contains to be enough to improve the polymer spheres of nailability or to process or its a kind of combination with water that the effect that is similar to polymer spheres is provided and the ratio that reacts powder.

If hope, said composition can have 0.4/1 to 0.7/1 water and the weight ratio of reacting powder.

The various prescriptions of the composite mortar that is used for using in the method also are shown in U.S. Patent No. application US2006/185267, US2006/0174572, US2006/0168905 and US2006/0144005, and it is combined in this with it all by reference in full.It is 35 to 75wt% sulfate alpha hemihydrate calcium, 20 to 55wt% water cement (for example Portland cement), 0.2 to 3.5wt% lime and 5 to 25wt% active pozzolans on dried basis weight as the reaction powder that representative formula will comprise.The continuous phase of this plate will strengthen and contain the even distribution light filler particle of group under being selected from of 20-50% by weight equably through alkali-resistant glass fibre, and this group is made up of the following: ceramic microsphere, glass microsphere, fly ash hollow microballoon and perlite.Although be used for the above-mentioned composition of SCP plate is preferred, and the relative quantity of these compositions (comprise and get rid of some above composition or add other compositions) can change to be suitable for the desired use of final products.

One embodiment of wet powder blender 47 is shown among Fig. 3.A mixture of powders that is made up of Portland cement, gypsum, aggregate, filler etc. is fed in the horizontal chambers 162 via a bellows 161 from an overhead bunker 160, and this horizontal chambers has a spiral propeller screw rod (auger screw) 163 that is driven by a side-mounted spiral propeller motor 164.These solids can be fed to spiral propeller screw rod 163 from this bunker 160 through a volumes metering-type charger or a weight metering formula charger (not shown).

Volume metering formula feed system will use with the spiral propeller screw rod conveyor 163 of a constant speed operation and in storage hopper storehouse 160, discharge powder with a constant rate of speed (volume time per unit, for example cubic feet per minute).The constant weight (for example, pound per minute) that weight metering formula feed system uses a volumes metering-type charger that is associated with weighing system to control with time per unit is usually discharged powder in storage hopper storehouse 160.Weight signal is used for constantly monitoring actual feed rate also compensates bulk density, porosity etc. through the speed (RPM) of adjustable screw propeller screw rod 163 variation via a feedback control system.

Spiral propeller screw rod 163 is fed directly to vertical mixing chamber 165 with powder via the powder inlet 166 of a top section 165A who is arranged in vertical mixing chamber 165.Then this powder fall into by gravity vertical mixing chamber 165 outfit the compresses lower section 165B of mixer.

The liquid that comprises water (for example passes through water inlet 167; Nozzle) is provided to vertical chamber 165 simultaneously; These water inlets 167 are installed on the top 165A periphery of chamber 165 at a some place that is lower than dry powder import 166, make the liquid that comprises water also drop down onto the at of the mixer section (lower part 165B) of vertical chamber 165.But the direction manual adjustments of these independent water inlets 167 is kept the accumulation that the surface does not have powder to be oriented on stirrer paddle or the like.These independent water inlets 167 can be equipped with valve 167A.Make powder and liquid fall into vertical chamber 165 dividually and advantageously avoided obstruction under the situation of mixing before the inlet chamber 165, and allow to use of spiral propeller 163 with the littler outlet of comparing that powder will use powder to be fed directly to this vertical chamber under the situation of mixing before the inlet chamber 165 with liquid at the powder inlet place of the chamber 165 that liquid and powder possibly occur.

Water is fully mixed by blender paddle 174 with powder, and this blender paddle has a plurality of stirrer paddles 175 that on paddle central shaft 173, rotated by roof-mounted electro-motor 168.The configuration that can change the number of the stirrer paddle 175 on this central shaft and comprise the stirrer paddle 175 of these a plurality of horizon bars 171 that are used for each stirrer paddle 175.The pin 179 (Fig. 3) that for example, can add vertically installation to the horizon bar 171 of blade 175 is to strengthen the stirring to slurry 46.Typically, these bars 171 are smooth horizontal members rather than angled, with the whirlpool among the lower part 165B that alleviates mixing chamber 165.In this embodiment, found to consider the higher mixing velocity that in the vertical chamber 165 of typical 12 inch diameters of the present invention, is obtained, can use the paddle 174 of a twayblade of horizon bar 171 with lesser number.The paddle that is used for the embodiment of the present invention of hybrid SC P slurry is designed to be adapted to the diameter of the lower part of this slurry and mixing chamber 165.The transverse width " W " that the diameter that increases the lower part of this mixing chamber has caused increasing paddle 174 (Fig. 3).Transverse width " W " in the increase of given RPM lower stirring paddle 174 (Fig. 3) increases its tip speed.This has caused a problem, forms a undesirable dark vortex because this paddle is more likely thrown slurry to the external margin of vertical mixing chamber 165 and in the middle of the lower part of mixing chamber 165.Be preferably designed to be through the number that makes horizontal mixed pole to the paddle that the SCP slurry adopted and minimize and to make horizontal mixed pole to flatten so that turbulent flow minimizes still guarantees simultaneously fully to mix and this problem is minimized.

Vertically the level of the slurry 46 in the mixing chamber 165 is by level control sensor 169 controls that are arranged in the electricity in the vertical mixing chamber 165.Control sensor 169 is controlled the flow of water and is controlled the powder feed that gets in the vertical chamber 165 through be switched on or switched off this spiral propeller motor 164 via a controller 162A via the valve 167A of electric control.Therefore the control of the volume of the water that adds and slurry be used for controlling vertical mixing chamber 165 slurry volume and vertically the mixing time of staying in the mixing chamber 165 both.In case slurry 46 is through fully mixing, then it is pumped to slurry feed device 44 from the bottom of vertical mixing chamber 165 via pump discharge 172 by mashing pump 170.Pump 170 is through 173 operations of paddle central shaft, and this paddle central shaft is driven by roof-mounted electronic horse speed 168.Yet,, can use an independent pump motor (not shown) to come driving pump 170 if hope.

Vertically the powder in the mixing chamber 165 and water to mix the time of staying very important to the design of vertical chamber 165.Slurry mix 46 must through abundant mixing and the denseness that has be can easily be pumped and uniform deposition above the glass layer much thick on this net sheet.

For producing well-mixed slurry 46, vertically chamber 165 provides one for typically about 10 applying shearing force to about 360 seconds average slurry slurry that suitable mixed volume spins in 174 pairs of these mixing chambers of paddle simultaneously for the time of staying.Typically, vertically chamber 165 provides about 15 to about 240 seconds average slurry time of staying.The RPM scope of blender paddle 174 typically is 70RPM to 270RPM.Other typical ranges of the average slurry time of staying are from about 15 seconds to about 30 seconds or about 20 seconds to about 60 seconds.

A typical embodiments of a vertical chamber 165 of blender 47 have the nominal inside diameter of about 8 to 14 inches (20.3 to 35.6cm) or 10 to 14 inches (25.4 to 35.6cm) (for example 12 inches (30.5cm)), about 20 to 30 inches (50.8 to 76.2cm) (for example about 25 inches (63.5cm)) total vertical height and about 6 to 10 inches (15.2 to 25.4cm) (for example about 8 inches (20.3cm)) at the vertical height of sensor below 169.When diameter increased, these paddles should be designed to adapt to this type of larger diameter so that the whirlpool effect of as above discussing that causes by increasing the paddle tip speed under the given RPM minimizes.These exterior tip of paddle be typically designed as near, for example within about 1/4th inches (0.64cm) or about 1/8th inches (0.32cm) of the inwall of chamber 165.Distance between the inwall of paddle tip and chamber 165 too conference causes slurry to be piled up.

Fig. 3 shows that blender 47 is fed directly to the finished ground cement of doing in the chamber 165 and with liquid and the finished ground cement of doing and is fed directly to dividually in the chamber 165.Therefore; Blender 47 causes the overall independently dropped downwards of powder and liquid through a space in this vertical mixing chamber, between the slurry pool among the corresponding import of powder and the liquid of this space in mixing chamber 165 top 165A and the lower part 165B of mixing chamber 165.Typically these solids and liquid all fall 6 inches at least.Preferably, these solids are fed in the chamber 165 at a some place of the liquid-inlet that is higher than chamber 165.

The paddle of vertically installing 174 has the central shaft 173 of a prolongation as shown in Figure 3.The number of the design of paddle 174, stirrer paddle 175 and under the situation of the pin 179 that has or do not have vertical installation the number of employed horizon bar 171 be the rotating speed of considering blender paddle 174, slurry viscosity or the like and confirm, to realize being used for guaranteeing the continuous operation of board assembly line 10 in slurry prepares powder and the water of wet slurry in the time of staying of chamber combined amount.

Suitable slurry blender 47 explains that in more detail in the title of submitting to simultaneously with the application be U.S. Patent Application Publication 2008/0101150A1 number of METHOD FOR WET MIXING CEMENTITIOUS SLURRY FOR FIBER-REINFORCED STRUCTURAL CEMENT PANELS [the wet mixed method that is used for the cement slurry of fibre-reinforced structure cement plate]; And title is the U.S. Patent Application Publication 2008/0101151A1 of APPARATUS and METHOD FOR WET MIXING CEMENTITIOUS SLURRY FOR FIBER-REINFORCED STRUCTURAL CEMENT PANELS [apparatus and method of wet mixed that are used for the cement slurry of fibre-reinforced structure cement plate], and the two is all submitted on November 1st, 2006; The two all is combined in this with it by reference in full.

Slurry feed device

Referring now to Fig. 1 to 1A and 4 to 7, as mentioned above, totally be appointed as this slurry feed device (also being called slurry head box, slurry feed station or slurry feeder) of 44 receives slurries 46 from wet mixed device 47 a supply.

Though considered various condensable slurries, this method is designed to the production structure cement plate especially.After this manner, that preferably know in Portland cement, gypsum, aggregate, water, accelerator, plasticizer, blowing agent, filler and/or this this area by the difference amount and other compositions that in the above patent of listing (being combined in this by reference), describe of slurry 46 constitute.The relative quantity of these compositions (comprise and get rid of some above composition or add other compositions) can change to be fit to the final products that expection will be produced.Disclosed a kind of exemplary material that is used for production structure cement plate ground in people's such as Tonyan the U.S. Patent Application Publication 2006/0174572 (it is combined in this by reference).

Slurry feeder 44 also has pivot pin 305, and this pivot pin has gusset 308 on the outer surface of the outer surface of next-door neighbour's sidewall 340.A kind of slurry is pumped to this slurry feed line 390 on the chassis (not shown) that laterally moves that is installed in inner bottom surface 350 tops that are positioned at this head box from the blender of feeding line 56 (Figure 1A), so that can be along this slurry of total inner surface pumping of head box.This mobile trolley used speed is accumulate to a level in the bottom of this slurry at this head box through regulating to keep this slurry along the even distribution on the whole surface of this head box simultaneously, and wherein this slurry overflows the antelabium of wasteway 380 and on the top surface of the slurry on the net sheet 26, is deposited as a continuous heavy curtain.Manual handgrip 310 is installed at least one in the pivot pin 305 allowing the operator that head box is rotated adjustable vertical york piece 300 in or to tilt, and these york pieces are installed in and are parallel to mobile forming net sheet 26 on these guide rails 12 of the direct of travel on the production line.

Head box 44 is by rotating vibrator 320 vibration, and this rotating vibrator is installed on the outer surface of head box 44 and is typically operated by a conventional hydraulic line (end illustrates).Rotating vibrator 320 typically is installed on the outside of head box back of the body wall 370, as shown in Figure 7.Stiffener 355 is the angle bar on basal surface that is installed on head box diapire 350 normally typically.Stiffener 355 is used to prevent the damage to the head box bottom, comprises the pressure " bow curved " of center because of just being pumped to the slurry in the head box of head box, and this will influence lays a continuous pulp layer to the ability of netting on the sheet 26.

The back lip-deep vibrating device 320 of the wall 370 of head box can be a pneumatic screw vibrator.Level of vibration can be controlled with the air regulator (not shown) of a routine.

Typically, slurry feeder (head box 44) be by: be bent and form a metal derby of a vertical rear wall 370 of rigidity, horizontal bottom wall 350 and just be attached to the wasteway 380 of an inclination of the top surface top of moving forming net sheet 26 from diapire 350.This head box is formed with the upright side walls 340 of a pair of relative stiffness then.Inclination wasteway 380 has a plurality of sidewalls 385.All inner surfaces of head box 44 are preferably processed or are applied by glutinous material (like TEFLON 10. material or similar material).Sidewall 340 and rear wall 370 have prevented the side of slurry 46 effusion slurry feeder (head box 44).Sidewall 340 (it has pivot pin 305 on each end of outer surface of these sidewalls) is that the open type york piece 300 through vertical adjusting is installed on the support frame 12 (Fig. 5), and these york pieces allow easily on the guide rail on the framework of this production line 12, to remove head box 44.These pivot pins allow head box 44 manually to be tilted up or down, typically are through use handgrip 310, but also can use a kind of preferred inadequately automatic adjusting.For example, under the situation that a kind of line is shut down, head box 44 is receded preventing slurry along wasteway 380 trickling continuously downwards, or all slurries can dump to mobile network sheet 26 at once downwards along wasteway 380 from head box.This has prevented the waste of slurry and has helped to prevent to produce unacceptable plate.

Pivot pin 305 on the head box is located by the operator particularly as follows: the inclination of regulating the pin in the york piece 300 through the handgrip 310 that uses on (for example) pivot pin; With the most advanced and sophisticated edge of tip angle and the wasteway 380 of keeping about 45 degree to the distance " A " (being shown among Figure 1A) between the product, to keep not damaged heavy curtain of slurry 46.

This edge, tip is designed to make this edge to keep low to being enough to not meet this tip keeping fragment and the chunk that a unbroken heavy curtain makes this edge, tip maintenance be high enough to allow to be positioned at below this wasteway simultaneously on the width of this net sheet.Found that this distance typically is between 0.5 and 1.5 inch (1.27 to 3.81cm).This keeps a good heavy curtain apart from operation and allows any cement fragment or chunk not to be captured on the dorsal part of wasteway simultaneously and cause " burden " that can cause forming useless plate.The position of these pivot pins is simultaneously kept most advanced and sophisticated edge distance to product near this edge, tip with the angle that allows the operator to change head box with actual the same.

A key character of the present invention is that this slurry feeder 44 has deposited a conforming layer with relative controlled thickness of slurry 46 on the carrier web sheet 26 that moves.The scope of suitable layer thickness is from about 0.08 inch to 0.16 inch or 0.25 inch.Yet owing in the structural slab of being produced by this production line 10, preferably have four layers, and a suitable building slab is about 0.5 inch, thereby an especially preferred slurry layer thickness is in 0.125 inch scope.Yet, be about 0.84 inch because the plate of a target forms thickness, so index bed thickness typically all more approaches about 0.21 inch at these 4 each place that forms in the station.0.1 the scope of inch to 0.3 inch every head box also possibly be suitable.

For guaranteeing that slurry 46 strides across the even layout of whole net sheet 26; Slurry 46 is delivered to a slurry feed line 390 via a flexible pipe 56 that is communicated with slurry blender or reservoir 47 fluids or similar pipeline, and this slurry feed line is mounted on the chassis (not shown) of back and forth advancing of inner surface 350 tops that are positioned at slurry head box 44.The side direction that one second end of flexible pipe 56 is connected to a type well known in the art back and forth, cable drives, hydrokinetic type distributor 390 (Fig. 6).Get into from the slurry that flexible pipe 56 flows to slurry feed line 390 and to be in the charger 44 of side direction in moving back and forth and to fill by the head box that antelabium defined of the wasteway 380 of sidewall 340, diapire 350, rear wall 370 and slurry head box 44 inner.

Before overflowing this antelabium and overflowing to the wasteway surface, the slurry degree of depth in the head box has typically reached about 1/4 inch (86mm), is that the top from the antelabium of bottom to the wasteway 380 of head box diapire 350 records.

When the slurry on the inclination wasteway 380 46 towards the carrier web sheet 26 that should move, importantly all slurries all moved equably downwards and are deposited on this net sheet along wasteway 380.

In order to help this; Slurry feeder 44 has a wasteway 380, this wasteway be directed to downwards on this net sheet with guarantee rare relatively slurry 46 be deposited as fully a continuous heavy curtain or slurry thin slice be directed to downwards equably carrier web sheet 26 about 0.5 to the distance of about 1.5 inches (172 to 381mm).This wasteway has edge 385 to guarantee slurry and surpass these sides and to lose and be not directed on this net sheet of advancing on each side of this wasteway.

In one embodiment of the invention, one shown in Fig. 1 and 1B and hereinafter to form and the explanation of smoothing method in the forming board or even dull and stereotyped 144 of the vibration of setting forth more in detail can after head box 44 is deposited on the net sheet 26, be added at once on this production line at slurry.

The processing in slurry feed device downstream

With reference to Fig. 1, other operating assemblies of SCP board assembly line will briefly be set forth once more, but it has carried out setting forth more in detail in following document:

People's such as Dubey title is the U.S. Patent number 6,986,812 (being combined in this in full with it by reference) of SLURRY FEED APPARATUS FOR FIBER-REINFORCED STRUCTURAL CEMENTITIOUS PANEL PRODUCTION; And

The U.S. Patent application of below unsettled jointly, co-assigned, they are combined in this with it all by reference in full:

People's such as Dubey title is the U.S. Patent Application Publication 2005/0064164A1 (application number 10/666,294) of MULTI-LAYER PROCESS and APPARATUS FOR PRODUCING HIGH STRENGTH FIBER-REINFORCED STRUCTURAL CEMENTITIOUS PANELS;

The title of Porter is the U.S. Patent Application Publication 2005/0064055A1 (application number 10/665,541) of EMBEDMENT DEVICE FOR FIBER-ENHANCEDSLURRY;

The title that on November 1st, 2006 submitted to is the U.S. Patent Application Publication 2008/0101150A1 of METHOD FOR WET MIXING CEMENTITIOUS SLURRY FOR FIBER-REINFORCED STRUCTURAL CEMENT PANELS;

The title that on November 1st, 2006 submitted to is the U.S. Patent Application Publication 2008/0101151A1 of APPARATUS and METHOD FOR WET MIXING CEMENTITIOUS SLURRY FOR FIBER-REINFORCED STRUCTURAL CEMENT PANELS;

The title that on November 1st, 2006 submitted to is the U.S. Patent Application Publication 2008/0099133A1 of PANEL SMOOTHING PROCESS AND APPARATUS FOR FORMING A SMOOTH CONTINUOUS SURFACE ON FIBER-REINFORCED STRUCTURAL CEMENT PANELS;

The title that on November 1st, 2006 submitted to is the U.S. Patent Application Publication 2008/0101151A1 of WET SLURRY THICKNESS GAUGE AND METHOD FOR USE OF SAME;

The title that on November 1st, 2006 submitted to is the U.S. Patent Application Publication 2007/0110970A1 of MULTI-LAYER PROCESS and APPARATUS FOR PRODUCING HIGH STRENGTH FIBER-REINFORCED STRUCTURAL CEMENTITIOUS PANELS WITH ENHANCED FIBER CONTENT;

The title that on November 1st, 2006 submitted to is the U.S. Patent Application Publication 2007/0110838A1 of EMBEDMENT ROLL DEVICE;

All be combined in this in full with it by reference.

Embedding device

Though considered various embedding devices; Include but not limited to vibrator, goat's horn roller and similar device, but in this embodiment of embedding device 70, comprise the substantially parallel axle 76 that at least one pair of is installed transverse to the direct of travel of the carrier web sheet 14 on the framework 12.Each axle 76 all is equipped with a plurality of large diameter relatively disks 76, and they are axially separated from one another by a plurality of minor diameter disk (not shown) on this axle.

At SCP plate production period, axle 76 is with the longitudinal axis rotation of disk 74 around axle 76.Like what know in this area; Power is provided for any one or both in the axle 76; And if only give one power is provided, then another can drive direction and speed with a correspondence keeping this driven shaft through belt, chain, gear drive or other known power transmission technologys.These are adjacent, the corresponding disk 74 of the axle 76 of preferred parallel overlaps each other and is meshing with each other, and act in slurry, to form a kind of " kneadings " or " massage ", this is embedding fiber 68 of previous deposition.In addition; These disks 74 near, intermeshing and the rotation relation prevented the accumulation of slurry 46 on disk; And formed a kind of " automatically cleaning " effect effectively, this has significantly reduced the production line stop time that the premature set because of the slurry piece causes.

The intermeshing relation of the disk 74 of axle on 76 comprises these minor diameters layout of disk (not shown) and a kind of next-door neighbour of the opposed periphery of large diameter relatively main disk 74 at interval, and this also helps automatic cleaning action.When these disks 74 rotation each other (but preferred along same direction), pulp particle is difficult to be trapped in this device and premature set with pressing close to.Through two groups of disks 74 of lateral offset each other are provided, slurry 46 has stood a plurality of destruction actions, thereby has created a kind of " kneading " effect, and this further is embedded in fiber 68 in the slurry 46.

An embodiment that is applicable to the embedding device 70 of production line 10 is disclosed in the title of submitting on September 18th, 2003 in more detail to be EMBEDMENT DEVICE FOR FIBER-ENHANCED SLURRY and to be combined in full in this common unsettled Patent Application No. 10/665,541 (disclosing as US 2005/0064055) with it by reference.

It is the Patent Application No. the 11/591st of MULTI-LAYER PROCESS and APPARATUS FOR PRODUCING HIGH STRENGTH FIBER-REINFORCED STRUCTURAL CEMENTITIOUS PANELS WITH ENHANCED FIBER CONTENT that another embodiment that is applicable to the embedding device of production line 10 is disclosed in the title of submitting on November 1st, 2006; The title that on November 1st, 793 and 2006 submitted to is among the U.S. Patent Application Publication 2007/0110838A1 of EMBEDMENT ROLL DEVICE, and both are combined in this with it all by reference in full.

Apply additional layer

In case embedding fiber 68, then plate 92 ground floor 77 is accomplished.In a preferred embodiment, the height of ground floor 77 or thickness are in 0.05 to 0.15 inch the approximate extents.Found this scope when with a SCP plate in similar layer desirable intensity and rigidity are provided when combining.Yet, also considered other thickness according to the final desired use of this SCP plate.

For build a kind of have hope the structure cement plate of thickness typically to add a plurality of additional layers.For this reason, being exercisable relation with mobile vehicle 14 provides one second slurry feeder 78 roughly the same with charger 44, and it is arranged as an additional layer 80 of deposition slurry 46 on existing layer 77.

Next; Being exercisable relation with framework 12 provides and shredding machine 36 and 66 roughly the same extra shredding machines 82; To deposit one the 3rd layer the fiber 68 that is provided by a support (not shown), this support is configured and settles with respect to framework 12 with the mode that is similar to support 31.Fiber 68 is deposited on the pulp layer 80 and uses one second embedding device 86 to carry out embedding.In structure and configuration, be similar to embedding device 70, this second embedding device 86 is installed to be slightly high with respect to mobile vehicle net sheet 14, so that ground floor 77 is not hindered.In this way, the slurry and the embedding fiber of the second layer 80 have been formed.

Referring now to Fig. 1 and Fig. 2,, for each layer in proper order of condensable slurry and fiber, it then is a fiber shredding machine 82 and an embedding device 86 that an extra slurry feeder station 78 is provided on production line 10.In this embodiment preferred, provide altogether four layers 77,80,88,90 to form SCP plate 92.

A key character of the present invention is that plate 92 has a plurality of layers 77,80,88,90, and these layers form an integral body, fibre-reinforced block when condensing.If as some desirable parameter of passing through presently disclosed and that set forth controls the existence and the layout of the fiber in each layer and it maintained in some desirable parameter area, then will hardly maybe be with plate 92 layerings of producing through this method.

Shaping and smoothing and cutting

After the embedding condensable pulp layer of these four fibers of layout as indicated above, can a building mortion be provided on framework 12 so that a upper surface 96 of plate 92 is shaped.

Yet the building mortion that scrapes off the SCP sheet material material of excess thickness is not desirable.For example, the building mortion (plate or vibration for example spring-loaded or vibration are even dull and stereotyped) that is designed to make plate be fit to desirable dimensional characteristic is not used in the SCP material, because they have scraped off the SCP material of excess thickness.This type of device can not scrape off or flatten this plate surface effectively.They can cause glass fibre to begin to roll and make a mess of the surface of plate rather than it is flattened and make it level and smooth.

Particularly, it is even dull and stereotyped to substitute spring-loaded device and vibration, and production line 10 can comprise a smoothing device 144 that is provided on the framework 12 with upper surface 96 smoothed that make plate 92 lightly, is also referred to as vibration and covers cover.Reinforcement members 150B and one that smoothing device 144 comprises an erecting bed 146 (Figure 1B), be fastened to a flexible thin sheet 148 on this erecting bed, prolonged the width of this thin slice 148 are preferably placed on this reinforcement members to cause the vibration generator (vibrator) 150 of thin slice 148 vibrations.Thin slice 148 has: be equipped with one the first vertical wall 148A of a U-shaped top 148B, an arcwall 148C and one second vertical wall 148D.Vibrator 150 provides power by a pneumatic hose 150A.The arc 148C of smoothing device 144 has a upstream extremity that pivotally is attached on the support bar 146A, and this support bar is attached to the installing rack 146 on the production line 10 again.Arc 148C has with contacted one of the top layer of the SCP material of process below it and trails downstream.If hope, smoothing device 144 is equipped with weight 159 to help this top level slurry of levelling.Smoothing device 144 can be provided at after last embedding station 86 or the smoothing device can be provided at each embedding station 70, after 86.

Reinforcement members 150B not only is used for strengthening this smoothing thin slice, and through this vibration unit is installed on this reinforcement members, thereby makes vibration stride across the length of this device more equably and distribute.For example; If this vibration unit directly is mounted to this smoothing thin slice (for example; At the center) and do not use this reinforcement members, then from the vibration of this vibration unit with highly being positioned this mounting points place, have only vibration relatively seldom to be output on the edge of this thin slice.This is not, this vibration unit can not be installed in beyond the reinforcement members 150B Anywhere, but it is an optimum position, in any case because reinforcement members be typically and it carried out the work of the vibration that distributes equably.

Through slurry 46 is applied vibration, smoothing device 144 assists fibers 30,68 to distribute to spread all over plate 92, and a surface 96 on more evenly is provided.

Be disclosed in submission on November 1st, 2006 and be among the U.S. Patent Application Publication 2008/0099133A1 of PANEL SMOOTHING PROCESS AND APPARATUS FOR FORMING A SMOOTH CONTINUOUS SURFACE ON FIBER-REINFORCED STRUCTURAL CEMENT PANELS with its title that is combined in this in full by reference about the additional detail of this building mortion 144 (be also referred to as vibration cover cover).

Considered like other other known building mortions in this area.Yet smoothing device 144 advantageously avoids making the part of SCP plate from carrier web sheet 26, to break or tear.Do not adopt the building mortion that scrapes off superfluous SCP material, this is because they make the SCP material breaks owing to the fibre property of panel products when it forms or tear.

At this moment, each layer slurry begun to condense, and corresponding plate 92 by a cutter sweep 98 and separated from each other, this cutter sweep is a water-jet cutting machine in a typical embodiments.Other cutter sweeps comprise moving blade, also are considered to be suitable for this operation, and prerequisite is that they can create suitable sharp edges in plate composition of the present invention.Cutter sweep 98 is settled so that the plate of producing has a desirable length with respect to production line 10 and framework 12, and this desirable length can be different from the expression shown in Fig. 1.Because the speed of carrier web sheet 14 is slow relatively, thereby the direct of travel that cutter sweep 98 can be installed to be perpendicular to net sheet 14 cuts.For speed of production faster, known this type of cutter sweep is an angle with net sheet direct of travel and is mounted on the production line 10.After cutting,, the plate 92 that separates is piled up for further disposing, pack, store and/or shipment like what know in this area.

Production line 10 comprises the fiber chopping station 36,66,82 that is enough to produce at least four layers 77,80,88 and 90 (Fig. 2), slurry feed station 44,78, and embedding device 70,86.Can form extra layer through the station of repeating as above to describe about production line 10.

After creating SCP plate 92, the bottom side 102 or the bottom surface of this plate can be more level and smooth than upside or end face 96, even after engaging by building mortion 94.In some cases, depend on the application of plate 92, it can preferably have an even surface and a coarse relatively face.Yet in other were used, what possibly hope was to have all level and smooth plate of a kind of wherein two faces 96,102.Level and smooth texture is to contact with level and smooth carrier 14 or carrier web sheet 26 through slurry to produce.

For obtaining all level and smooth SCP plate of a kind of two faces or both sides; Above and below 96,102 both all can be formed and be resisted against carrier 14 or discharge on the net sheet 26, be disclosed in the U.S. Patent Application Publication 2007/0110970A1 of MULTI-LAYER PROCESS AND APPARATUS FOR PRODUCING HIGH STRENGTH FIBER-REINFORCED STRUCTURAL CEMENTITIOUSPANELS WITH ENHANCED FIBER CONTENT like the title of submitting on November 1st, 2006.

Another replacement scheme (end illustrates) is that one or two face or side 96,102 are carried out sand milling.

Of the present invention another is characterised in that the SCP plate 92 of gained is constructed to make fiber 30,68 to distribute equably and spreads all over this plate.Found this make it possible to through to fiber relatively less, more efficient use produces relatively firmer plate.Fiber volume fraction for the slurry volume in each layer preferably account for greatly pulp layer 77,80,88,90 by volume 1% to 5%, in preferred 1.5% to 3% the scope by volume.If hope, outer 77,90 can have than one of internal layer 80,88 or both higher volume fractions.

Second embodiment of production line

The loose fiber that distributes in conjunction with the spreading all over slurry 46 of a volumes mark is a key factor for obtaining desirable plate intensity.Therefore, the improved efficient in combining this fibrid makes us hoping.It is believed that the system of describing among Fig. 1 needs the too much slurry number of plies to obtain a kind of SCP plate with enough fiber volume fractions in some cases.

Therefore, a kind of production line of alternative SCP plate or system demonstration are in Fig. 8 and be appointed as 130 generally, are to be used to produce for each pulp layer all combined fibre-reinforced SCP plate high relatively fiber volume, high performance.In many cases, use this system to obtain the fiber level of the increase of each plate.Though the system of Fig. 1 has disclosed single fiber discrete layer is deposited in each the follow-up slurry discrete layer that is deposited after the initiation layer, production line 130 is included in a process of a plurality of discrete fortifying fibre layers of accumulation in each discrete pulp layer to obtain desirable plate thickness.More preferably, the system that is disclosed is embedded into two discrete fortifying fibre layers in the independent slurry discrete layer in a single operation at least.These discrete fortifying fibres are to use the embedding device of a kind of suitable fiber and are embedded in this slurry discrete layer.

Or rather, in Fig. 8, be used for system 130 and specify by identical Ref. No., and think that above explanation to these assemblies is applicable to here with the assemblies that the system of Fig. 1 10 is shared.In addition, having considered can be by the structure that a kind of device of retrofiting mode and Fig. 1 makes up or new about the described device of Fig. 8.

The title that the system 130 that has also considered Fig. 8 can be equipped with on November 1st, 2006 to submit to is the upper deck (deck) 106 of the Patent Application No. 11/591,793 of ULTI-LAYER PROCESS AND APPARATUS FOR PRODUCING HIGH STRENGTH FIBER-REINFORCED STRUCTURAL CEMENTITIOUS PANELS WITH ENHANCED FIBER CONTENT.

In the system 130 that substitutes, the production of SCP plate is initial by the fiber 30 loose, chopping of a ground floor of deposition on net sheet 26.Next, slurry feed station or slurry feeder 44 receive a supply of slurry 46 from far-end blender 47.

Considered in the production line 10 of blender 47 and slurry 46 and slurry feeder 44 and Fig. 1 in this embodiment employed identical.

In addition, slurry feeder 44 is essentially identical, comprises sidewall 340 and 370 and wasteway 380.The scope of suitable layer thickness is from about 0.05 inch to 0.35 inch (0.13 to 0.9cm).For instance, in order to make 3/4 inch structural slab that (1.9cm) is thick of a nominal, for the especially preferred slurry layer thickness less than about 0.25 inch (0.64cm) in the preferred structure plate of being produced by this method, four layers are preferred.

With reference to Figure 1A, slurry 46 via be arranged in side direction back and forth, cable drives, the flexible pipe 56 of the distributor 390 (shown in Fig. 6 and 7) of hydrokinetic type and be delivered to charger 44.Therefore the slurry that flows out from flexible pipe 56 pours into and is in the charger 44 of a kind of side direction moving back and forth to fill by sidewall 340 and 370 and the basal surface 350 of the head box that defined of wasteway 380.

Along with the slurry on this inner surface 46 is reduced to the about 1.5 inches scopes that are positioned at carrier web sheet 26, thereby allow the successive sedimentation of a unbroken slurry heavy curtain on this net sheet or formation line, this is important for producing uniform plate.

The second chopping station that preferred and a shredding machine 36 are identical or install 66 be placed in charger 44 downstream, on slurry 46, to deposit the fiber 68 of a second layer.Can come to shredding mechanism 66 charging cords 34 from identical support 31 shredding machine 36 chargings.Yet having considered to provide independent support 31 to each independent shredding machine.

Refer again to Fig. 8, next, a mobile vehicle 14 of totally being appointed as 136 embedding device and slurry 46 and production line 130 is exercisable relation and is placed, and is embedded in the slurry 46 with the fiber 30,68 with first and second layer.Though considered various embedding devices; Include but not limited to vibrator, poker roller and similar device; But in this preferred embodiment, embedding device 136 is to be similar to embedding device 70, except adjacent shaft 138 overlapping reduced to about 0.5 inch scope.In addition, the number of disk 140 reduces, and disk is obviously thicker.In addition, there being an interval or a space more closely on 0.010 to 0.018 inch grade between the adjacent overlapping disk 140 of adjacent shaft 138, be stuck between the adjacent discs to prevent fiber.

The title that the further details of embedding device 136 was submitted to referring on November 1st, 2006 is the U.S. Patent Application Publication 2007/0110838A1 of EMBEDMENT ROLL DEVICE, and it is combined in this by reference.

Different ground, embedding device 136 provide and the kneading effect of device 70 identical category, and purpose is that fiber 30,68 is embedding or fully be mixed in the slurry 46.

If hope embedding in further fortifying fibre 30,68 to the slurry 46, provide the adjacent vibrator 141 of at least one and carrier web sheet 14 or gauze sheet 26 operability to vibrate slurry 46 then for framework 12 at each embedding device 136 place.Found that this vibration distributes the fiber 30,68 of chopping more equably and spreads all over slurry 46.Think that conventional vibrating device is applicable to this purposes.

As seen in fig. 8; In order to implement each layer slurry 46 had the native system 130 of multi-layer fiber 30,68; Embedding device 136 and back with slurry feed case 78 between extra chopping station 142 is provided, with to each layer slurry 46, before this slurry of deposition with deposit fiber 30,68 afterwards.Found that this improvement makes it possible to significantly more fiber is introduced the intensity that in this slurry and therefore improves gained SCP plate.In this preferred embodiment,, provide the slurry and the fiber that amount to the combination of four layers to form SCP plate 92 though only shown three.

After the embedding condensable slurry of the fiber that deposits these four layers as stated, preferably a building mortion 144 (for example cover is covered in this smoothing device or vibration) is provided so that a upper surface 96 of plate 92 is shaped or smoothed to framework 12.Through slurry 46 is applied vibration, smoothing device 144 has assisted fiber 30,68 to spread all over the distribution of plate 92, and a upper surface 96 more uniformly is provided.Smoothing device 144 comprises an erecting bed 146, be fastened to a flexible thin sheet 148 on this erecting bed, extended thin slice 148 width a reinforcement members 149 and be preferably placed at this reinforcement members to cause a vibration generator 150 of this thin slice vibration.

Mention like preceding text, a key character of the present invention is that plate 92 has a plurality of layers 77,80,88,90 of the fibre-reinforced block that after condensing, forms an integral body.If as the existence of the fiber in each layer that hereinafter discloses and describe and layout be to control and be maintained in these parameters by some desirable parameter, then hardly maybe be with plate 92 layerings that this method produced.

Utilize two discrete fortifying fibre layers that following benefit is provided to each independent discrete pulp layer.At first, the fiber total amount of waiting to be attached in this pulp layer is divided into the fibre weight that two or more discrete fibre layers have reduced the correspondence in each discrete fibre layer.The fibre weight that reduces in the independent discrete fibre layer has improved the embedding efficient in fiber to the pulp layer.Improved fiber embedding efficient and then the interface that has produced the excellence between fiber and the cement matrix combine and the interaction of machinery.

Next, can more substantial enhancing fibre be attached in each pulp layer through utilizing a plurality of discrete fortifying fibre layers.This is owing to finding that the simplification that fiber is embedded in the pulp layer is this discovery of total surface area of depending on the fiber in the discrete fibre layer.Embedding along with the increase of fibre weight in discrete fibre layer become the further difficulty of fiber in pulp layer, thus the increase of waiting to be embedded in the fiber surface area in the pulp layer caused.Found that when the total fiber surface area in the discrete fibre layer reaches a critical value embedding the becoming in fiber to the pulp layer hardly maybe.This has stipulated a upper limit for the fibre weight that can successfully be attached in the discrete pulp layer.Be attached to the given total fiber amount in the discrete pulp layer for waiting, use a plurality of discrete fibre layers to reduce the total fiber surface area in each discrete fibre layer.This reducing of fiber surface area (because of using due to a plurality of discrete fibre layers) and then provide and increase the possibility that can successfully be embedded into the total fiber amount in the discrete pulp layer.

In addition, use a plurality of discrete fibre layers to allow with respect to run through the great flexibility for the Fiber Distribution of plate thickness.Can change fibre weight in the independent discrete fibre layer to realize desirable target.When having the plurality of discrete fibrage, the creation of one " interlayer " structure that has promoted greatly to be produced.From product strength and cost optimization viewpoint the two, its fibrage is preferred especially in the plate configuration that has higher fibre weight near the plate top layer and in the fibrage near the plate inner core, have lower fibre weight.

On the quantity meaning, as a part of native system 130, thickness and the fiber strand diameter of number, the fiber volume fraction in the plate and each pulp layer of having studied and confirmed fiber and pulp layer is to the influence of the embedding efficient of fiber.Introduce and derive under the situation that relates to two discrete fibre layers and a discrete pulp layer a kind of Mathematical treatment below for the notion of projection fiber surface area mark.Found then maybe fiber be embedded in the pulp layer hardly if the projection fiber surface area mark of discrete fibre layer surpasses 1.0 value.Can embedding fiber when following although drop to 1.0 at projection fiber surface area mark, in projection fiber surface integration amount less than obtaining best result at 0.65 o'clock.When the scope of projection fiber surface area mark was between 0.65 and 1.00, efficient and simplification that fiber is embedding changed, wherein best fiber is embedding be 0.65 o'clock and the poorest be 1.00.Examine should this mark another kind of mode be slurry a surface about 65% by fiber-covered.

If,

v _tThe cumulative volume of=base fiber-pulp layer

v _{F, l}=total fiber volume/layer

v _F1Fiber volume in the discrete fibre layer 1 of=base fiber-pulp layer

v _F2Fiber volume in the discrete fibre layer 2 of=base fiber-pulp layer

v _{S, l}Slurry volume in=base fiber-pulp layer

V _{F, l}The total volume fraction of the fiber in=base fiber-pulp layer

d _fThe diameter of=individual fibers thigh

l _fThe length of=individual fibers thigh

t _l=comprise the gross thickness of the individual course of slurry and fiber

t _{S, l}Slurry layer thickness in=base fiber-pulp layer

X _fLayer 2 fiber volume of=base fiber-pulp layer and the ratio of layer 1 fiber volume

n _{F, l}, n _{F1, l}, n _{F2, l}Fiber sum in the=fibrage

In order to confirm a fibrolaminar projection fiber surface area mark in a kind of arrangement of the fibrage/pulp layer/fibrage interlayer that constitutes by a discrete pulp layer and two discrete fibre layers, draw following relation.

If

The volume of pulp layer equals v _{S, 1}

The volume of fiber equals v in the layer 1 _F1

The volume of fiber equals v in the layer 2 _F2

The total volume fraction of fiber equals V in base fiber-pulp layer _{F, l}

The gross thickness of base fiber-pulp layer equals t _l

The thickness of pulp layer equals t _{S, l}

If

The cumulative volume of fiber (that is the fiber in layer 1 and the layer 2) equals v _{F, l}:

v _f，l＝v _f1+v _f2 (1)

And,

$\frac{v_{f2}}{v_{f1}}=X_f---\left(2\right)$

If

The cumulative volume of base fiber-pulp layer, v _t=

The cumulative volume of pulp layer+these two fibrolaminar cumulative volumes=

v _s，l+v _f，l＝v _s，l+v _f1+v _f2 (3)

Combination (1) and (2):

$v_{f1}=\frac{v_{f,l}}{(1+X_f)}---\left(4\right)$

Total fiber volume according to the base fiber-pulp layer of total fiber volume fraction can be written as:

v _f，l＝v _t*V _f，l (5)

Therefore, the fiber volume in the layer 1 can be written as:

$v_{f1}=\frac{v_t{V}_{f,l}}{(1+X_f)}---\left(6\right)$

Similarly, the fiber volume in the layer 2 can be written as:

$v_{f2}=\frac{X_f{v}_t{V}_{f,l}}{(1+X_f)}---\left(7\right)$

Suppose that fiber has cylinder form, then the fiber sum n in the layer 1 _{F1, l}Can draw by equation 6, as follows:

$n_{f1,l}=\frac{{4v}_t{V}_{f,l}}{\mathrm{\π}(1+X_f)d_f^2{l}_f}---\left(8\right)$

Wherein, d _fBe the diameter and the l of fiber strand _fBe the length of fiber strand

Similarly, the fiber sum n in the layer 2 _{F2, l}Can draw by equation 7, as follows:

$n_{f2,l}=\frac{{4X}_f{v}_t{V}_{f,l}}{\mathrm{\π}(1+X_f)d_f^2{l}_f}---\left(9\right)$

The proj ected surface areas of a cylindrical fibre equals the product of its length and diameter.Therefore, the total projection surface area

of all fibres can be derived as in the layer 1:

$s_{f1,l}^P=n_{f1,l}*d_f*l_f=\frac{{4v}_t{V}_{f,l}}{\mathrm{\π}(1+X_f)d_f}---\left(10\right)$

Similarly, the total projection surface area of fiber can be derived as in the layer 2:

$s_{f2,l}^P=n_{f2,l}*d_f*l_f=\frac{{4X_{f}v}_t{V}_{f,l}}{\mathrm{\π}(1+X_f)d_f}---\left(11\right)$

The proj ected surface areas of pulp layer can be written as:

$s_{s,l}^P=\frac{v_{s,l}}{t_{s,l}}=\frac{v_t}{t_l}---\left(12\right)$

The projection fiber surface area mark of fibrage 1 defines as follows:

Composite equation formula 10 and 12, the projection fiber surface area mark of fibrage 1

can be derived as:

$S_{f1,l}^P=\frac{{4V}_{f,l}{t}_l}{\mathrm{\π}(1+X_f)d_f}---\left(14\right)$

Similarly; Composite equation formula 11 and 12, the projection fiber surface area mark of fibrage 2

can be derived as:

$S_{f2,l}^P=\frac{{4X_{f}V}_{f,l}{t}_l}{\mathrm{\π}(1+X_f)d_f}---\left(15\right)$

Equations 14 and 15 depict projected fiber surface area fraction of the parameter

and

In addition to the variable for the total fiber volume fraction% than certain other variables dependencies.This class variable is the thickness of the diameter of fiber strand, discrete pulp layer and the fibre weight (ratio) in the independent discrete fibre layer.

Real face is observed and is confirmed that the embedding efficient that covers one deck fiber networking layer on the cement mortar bed of material changes with parameter " projection fiber surface area mark ".Found that projection fiber surface area mark is more little, just more easily it has been embedded in this pulp layer.The reason of the good embedding efficient of fiber can be explained by the following fact: the open area in fiber networking layer or the scope of porosity increase along with reducing of projection fiber surface area mark.In the time can obtaining bigger open area, to promote slurry and seen through this fiber networking layer, this converts the embedding efficient of fiber of enhancing into.

Therefore, in order to realize the embedding efficient of good fiber, objective function becomes makes the fiber surface area mark keep below some critical values.It should be noted that the one or more variablees that in equation 15, occur through changing, can customize projection fiber surface area mark to realize the embedding efficient of good fiber.

The amplitude that has identified the different variablees of the amplitude that influences projection fiber surface area mark and proposed customized " projection fiber surface area mark " is to realize the approach of the good embedding efficient of fiber.These approach relate to one or more variablees below the change so that projection fiber surface area mark remains below a threshold limit value: the thickness of the different fibrages and the number of pulp layer, different pulp layers, and the diameter of fiber strand.

Based on this element task, found that the preferred amplitude of projection fiber surface area mark

is following:

Preferred projection fiber surface area mark

Most preferred projection fiber surface area mark

Plate fiber volume fraction V for a design _fThe percentage fiber volume fraction of 1% to 5% in each pulp layer for example, the realization of the above-mentioned preferred amplitude of projection fiber surface area mark can might be carried out through customizing one or more following variablees: the thickness of different fibrolaminar total numbers, different pulp layers and the diameter of fiber strand.Particularly, cause the desirable scope of these variablees of preferred amplitude of projection fiber surface area mark following:

The thickness of different pulp layerst _{S, l}

The preferred thickness of different pulp layers, t _{S, l}≤0.35 inch

The more preferably thickness of different pulp layers, t _{S, l}≤0.25 inch

The most preferred thickness of different pulp layers, t _{S, l}≤0.15 inch

The diameter of fiber strand, d _f

Preferred fiber strand diameter, d _f>=30 spies

Most preferred fiber strand linear diameter, d _f>=70 spies

Instance

Instance 1

Common unsettled Patent Application No. 11/655; 647 method is to use the basic generation line 130 shown in Fig. 8 to move, and is to use head box 44 of the present invention to replace the slurry feed system described in this common pending application with respect to unique modification of the method in this common pending application number.The cement of this slurry partly comprises the sulfate alpha hemihydrate calcium of 65wt%, the III type Portland cement of 22wt%, the silicon ash of 12wt% and the white lime of 1wt%.The liquid of this slurry partly comprises the ADVACAST superplasticizer that is provided by W.R.Grace and Co of water and the 0.81wt% of 99.19wt%.This liquid: the weight ratio of cement is 0.55 and this aggregate (EXTENDOSPHERES SG microballoon): the weight ratio of cement is 0.445.

This slurry is to use that native system is produced according to this method and is shown as has four pulp layers 77,80,88 and 90, as shown in Figure 2.It only is exemplary that this plate should be regarded as, because a kind of plate 92 of producing through native system can have one or more layers.Through utilizing above-mentioned these mathematical relationships, pulp layer 77,80,88 and 90 can have different fiber volume fractions.For example, top layer or surface layer 77,90 have 5% specified fiber volume fraction V _f, internal layer 80,88 then has 2% appointment V _fThis provides the external intensity with enhancing and has had a kind of plate than the inner core of small intensity, and this is for some application, or former thereby to practice thrift fiber possibly be desirable from cost.Considered fiber volume fraction V _fCan change at layer 77,80,88, between 90 being suitable for this application, can change as the number of layer.

In addition, can in each pulp layer, accomplish the modification of fiber content.For example, for 5% fiber volume fraction V _f, for example, fibrage 1 randomly has 3% appointment slurry volume mark and fibrage 2 and randomly has 2% specified fiber volume fraction.Therefore, X _fTo be 3/2.

The slurry that is fed to head box 44 via flexible pipe 390 is to the same feedstock speed charging of each flexible pipe with about 1.15 cubic feet of per minutes, but exercisable scope can be from about 0.5 to 2.5 cubic feet of per minute.The reciprocating type chassis of this slurry strides across head box with a speed of about 20 per minutes (being about 1.5 times of reciprocal speed of the method for prior art) and laterally reciprocal, with the even distribution that with regard to the lower slurry volume of being kept in the head box of the present invention, guarantees to spread all over head box.If hope, the reciprocating type chassis of this slurry can increase to about 30 to 40 strokes with the slurry feed rate that allows about 2.5 to 3.5 cubic feet of per minutes and up to the net sheet linear velocity of advancing of 50 feet per minutes across the speed of head box.Head box of the present invention to the head box capacity of about 62.5 cubic inches of slurries be about 5 inches wide * 50 inch long * about 0.25 inch dark.The width of head box can change reach 1.0 inches of plus or minus and the slurry degree of depth can change between about 0.125 and 0.500 inch.Comparatively speaking, the head box scope of using in the head box of prior art can from 1 to 2 gallon (231 to 462 cubic inches).This head box is vibrated so that the consistency change in the slurry minimizes with about 12,000 vibration per minutes or a bigger speed.Be directed near flowing out from head box with the slurry that causes previous deposition and flow downward in the head box rear portion of wall 370 from the slurry of flexible pipe 390 stream along slurry wasteway 380.This has promoted the flow behavior that last in, first out in the head box, has hindered the stagnation of slurry in head box.Have from about 0.35 to 2.5 cubic feet/min, the sedimentation rate slurry to the head box of 0.5 to 2.5 cubic feet/min more typically; Keep simultaneously under the situation that is deposited on the continuous slurry heavy curtain on the net sheet, the linear velocity of this production line can be from being low to moderate 5 feet per minute clocks to about 35 feet per minute clocks, more typically between 7 and 35 feet per minute clocks.

When the flowing velocity of slurry is about 1.5 to 2.5 cubic feet of per minutes; Just being deposited on the length that head box has been crossed in the reciprocal charging of the slurry in the head box, is between between about 10 and 40 per minutes and more typically between about 20 and 30 per minutes.

If linear velocity increases to about 35 to 50 feet per minute clocks, then for the flow rate of about 2.5 to 3.5 cubic feet/min, the number of times that the length of head box is crossed in this charging can increase to the upper limit of 30 to 40 these scopes of per minute.

For this head box, it is low to 5 feet per minutes or increase to 50 feet per minutes nearly and do not align the denseness that is deposited on the slurry heavy curtain on the net sheet from the wasteway of head box and have adverse effect that linear velocity can reduce to.With respect to can not be up to the linear velocity of about 50 feet per minutes the time with the about 2.5 slurry flow rates to about 3.5 cubic feet/min the prior art head box design of consistent slurry heavy curtain being provided, this is a kind of special improvement.In the prior art head box, the rotating speed of these rollers must enlarge markedly the slurry flow rate that surpasses about 2.5 cubic feet/min to handle in the head box.This causes slurry flowing above the top of head box and the side and leaning on gravity sedimentation on this advances the net sheet.This does not cause consistent slurry heavy curtain to be deposited on this net sheet of advancing.

Use the system of Fig. 8 and use above-mentioned projection fiber surface area mark formula to make a plurality of plates by above-mentioned paste compound.The scope of plate thickness is from 0.5 to 0.82 inch.The scope of independent slurry layer thickness is from 0.125 to 0.205.The scope of total fiber volume fraction Vf is from 2.75% to 4.05%.

Though shown and explained a specific embodiments that is used for the slurry feed device of the present invention that fibre-reinforced structure cement plate produces, those of ordinary skills will be appreciated that can to its make change and revise and not of the present invention widely aspect and as following claims illustrate deviate from the present invention.

Claims (10)

1. slurry feed device, this device are used for depositing slurry having on the forming net sheet that moves of a direct of travel, and this device comprises:

A head box, this head box are installed into transverse to the direct of travel of this mobile network sheet and have a basal surface and a downward-sloping wasteway is used for slurry is guided to this forming net sheet;

A plurality of vertical edge listriums, these vertical edge listriums comprise a head box back of the body margin plate and two relative head box side listriums on the side of three correspondences of this head box, overflow the both sides and the back side of this head box to prevent slurry;

A plurality of pivot pins; These pivot pins are installed on the outer surface of these two relative head box side listriums; The open type york piece that is used for through using a plurality of vertical adjustings is installed on the relative sidewall of the correspondence of a conveyer that is used for this mobile network sheet with this head box, these open type york pieces have be used for this head box of up-down adjustment an angle of inclination so that the device that control is flowed along a downward slurry of wasteway device;

A vibrator, this vibrator are installed in these vertical edge listriums of this head box at least one the outer surface and are used to make this head box vibration;

A reciprocating type slurry delivery mechanism, this slurry delivery mechanism are configured and are arranged to and be used for to this head box slurry being provided; And

Wherein, this wasteway is from this head box and the net sheet below tilting to is used for this slurry is deposited into this net sheet.

2. device as claimed in claim 1; Further comprise leverage; This leverage is attached on one of inner surface of this head box; Be used for when this head box is in this open type rail frame, this head box being tilted, be used to regulate the slurry that arrives this net sheet from this head box along this wasteway downwards and flow with manual mode.

3. device as claimed in claim 1; Wherein this delivery mechanism comprises a pipeline; This pipeline is connected on the slurry source and has an end of the inner surface of this head box of next-door neighbour; This pipe end is engaged in the reciprocating mechanism, and this reciprocating mechanism laterally moves back and forth this pipe end between a plurality of ends of this head box.

4. device as claimed in claim 1, wherein this head box is arranged to generally the direct of travel transverse to this net sheet.

5. device as claimed in claim 1, wherein this head box is installed in a plurality of york pieces by pivoting, and these york pieces are attached on these sidewalls of a production line of this mobile network sheet of carrying,

Comprise that further a regulating system is used to regulate the position of this head box, this regulating system comprises:

One first pivot pin, this first pivot pin functionally are connected on the side of this head box,

One second pivot pin, this second pivot pin is connected on these relative sidewalls of this slurry head box.

6. one kind is used for a conforming layer of a kind of cement slurry of the head box of installing from the described pivoting of claim 1 is deposited to the continuation method on the net sheet of advancing that comprises layer of glass, and this continuation method comprises:

On the inner surface of the head box that this pivoting is installed, deposit slurry,

Vibrate in this head box slurry so that this slurry through the wasteway of an inclination; And

To deposit on the glass layer on the net sheet of advancing with a continuous heavy curtain from the slurry of this wasteway.

7. method as claimed in claim 6 wherein makes this head box vibrate with the speed of about 12,000 vibrations of per minute.

8. method as claimed in claim 6, wherein this slurry has about 0.4 to about 0.7: 1 water and cement weight ratio.

9. method as claimed in claim 6, wherein this head box is designed to make slurry to be maintained at about the degree of depth place between 0.125 to 0.5 inch.

10. method as claimed in claim 6, wherein the linear velocity of a carrier on this net sheet of advancing is between 5 to 50 feet per minute clocks.

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